Product details

Product details

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Purpose

Isolation and purification of circulating and Exosome-associated genomic DNA from plasma and serum

Brand

ExoDNAPS™

Sample Type

Plasma, Serum

Characteristics

ExoDNAPS™ Kit (isolation and purification of circulating and Exosome-associated DNA) combines the ability of ExoPure™ to isolate exosomes from a wide range of biofluids (plasma and serum) with a user friendly system of DNA purification. Isolated exosomes are lysed with the appropriate lysis buﬀer and exosome DNA is purified by and exosome DNA is purified by spin columns and optimized buffers with a fast turnaround time. In addition, ExoDNAPS™ provides lyophilized exosomes to be used as quality controls for exosome capture and DNA extraction. The procedure takes about 1 hour and 45 minutes for yielding purified genomic DNA. Furthermore, ExoDNAPSTM Kit provides lyophilized exosomes to be used as quality controls for exosome capture and DNA extraction. Exosome standards for positive control are also included in the kit. All our kits guarantee high efficiency isolation of circulating and Exosome-associated genomic DNA than similar products.

Washing Buffer 1 and Washing buffer 2: Add the volume of pure ethanol (96 % ) indicated on the label of the bottles of both Washing Buffers.

ExoPureTM, Elution buffer and Lysis buffer are ready to use.

Lyophilized Exosome Standards:

Reconstitute lyophilized exosome standard by adding 100 μL of deionized water and pipetting the solution up and down 10-15 times, avoiding bubbles. Vortex the reconstituted standard for 60 sec. Briefly centrifuge the tubes containing the standard to ensure that the solution is collected at the bottom of the tube.

Centrifuge 20 min at 10,000g (centrifuge can be performed at 4 °C as well as at RT).

Discard the supernatant.

Eliminate the remaining supernatant into the tube with a tip.

Resuspend isolated exosomes in 200 μL of 1x PBS.

DNA Extraction:

Lysis:

Add 20 μL of Proteinase K (600 mAU/mL).

Add 200 μL of Lysis Buffer.

Add 5 μL of Poly A Carrier (optional)*.

Mix well by vortexing 30 sec.

Incubate samples at 56 °C for 10 min. The use of Poly A Carrier results in an increase in DNA yield, in particular when small amounts of DNA are purified through silica membrane columns. No adverse effect on downstream applications such as PCR have been observed (Shaw et al. 2009).

DNA Purification:

Add 200 μL of Ethanol 96 % and mix by inverting the tube 6-8 times.

Transfer the mixture in a Spin Column and centrifuge at 10,000 g for 1 min. Discard the flow-through.

The RNase free column and elution tubes should be stored at room temperature as well as at 4 °C.

The remaining reconstituted Exosome standard stock solution should be aliquoted into polypropylene vials (preferably low binding) and stored at -20 °C for up to one month or at -80 °C for up to six months. Strictly avoid repeated freeze and thaw cycles.

All the opened buffers and diluted reagents including ExoPureTM, lysis buffer, washing buffers, ploy A carrier, proteinase K and the elution buffer should be stored at 4 °C.